LEMON Manuals: Even more car manuals for everyone
Home >> Cadillac >> 2013 >> Escalade Hybrid, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Controls/Fuel - 5.3L, 6.0L, 6.2L - DTC P0442 To DTC P3449 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0449 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition OFF, disconnect the harness connector at the Q13 evaporative emissions vent solenoid valve.
  2. Ignition OFF, verify that a test lamp illuminates between the B+ circuit terminal B or 2 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, test all components connected to the B+ circuit and replace as necessary.
  3. Ignition ON, verify that a test lamp does not illuminate between the B+ circuit terminal B or 2 and the control circuit terminal A or 1.
    • If the test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal, replace the K20 engine control module.
  4. Remove the test lamp, and install a 3 A fused jumper wire between the control circuit terminal A or 1 and the B+ circuit terminal B or 2. Command the vent solenoid ON with a scan tool. Verify the scan tool EVAP Vent Solenoid Valve Control Circuit High Voltage Test Status is Fault.
    • If not the specified value, test the control circuit for an open/high resistance. If the circuit tests normal, replace the K20 engine control module.
  5. If all circuits test normal, test or replace the Q13 evaporative emissions vent solenoid valve.
scientia non olet · About LEMON Manuals